The Iberian country joined as a non-regional member of CABEI in 2005. At the end of 2023, it has a subscribed capital of US$280 million, with capital payments of US$70 million, occupying a shareholding of 4.19%.

The link between CABEI and Spain facilitates financial support to the Central American region, through the subscription of several financial cooperation contracts for an amount of US$702.7 million. Of these funds, US$564.4 million have been channeled through agreements subscribed with the Official Credit Institute (ICO). The remaining US$138.3 million come from the Spain-Honduras Debt Conversion Agreement, with the Ministry of Economy and Enterprise. During 2023, a financing agreement was signed with the ICO for an amount of up to US$150 million, intended to finance investment and/or liquidity and export/import operations of Spanish companies in CABEI member countries. Also in 2023, a total of US$115.3 million was raised from the ICO, across all current agreements between both institutions.